18
Main circuit terminal specifications
(3) Total wiring length
The overall wiring length for connection of a single motor or multiple motors should be within 500m.
(The wiring length should be 100m maximum for vector control.)
(4) Cable size of the control circuit power supply (terminal R1/L11, S1/L21)
· Terminal screw size: M4
· Cable size: 0.75mm
2
to 2mm
2
· Tightening torque: 1.5N·m
Total wiring length
When driving a 400V class motor by the inverter, surge voltages attributable to the wiring constants may occur at
the motor terminals, deteriorating the insulation of the motor.
Refer to
for measures against deteriorated insulation.
CAUTION
· Especially for long-distance wiring, the inverter may be affected by a charging current caused by the stray capacitances of the
wiring, leading to a malfunction of the overcurrent protective function or fast response current limit function or a malfunction or fault
of the equipment connected on the inverter output side. If fast response current limit function malfunctions, disable this function.
(For
Pr. 156 Stall prevention operation selection, refer to chapter 4 of
the instruction manual (applied).
)
For explanation of surge voltage suppression filter (FR-ASF-H), refer to the manual of each option.
· Do not perform vector control with a surge voltage suppression filter (FR-ASF-H) connected.
500m or less
300m
300m
300m + 300m = 600m
Summary of Contents for FR-A741-11K
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